We had the perfect 3-month stay at Vanichapark. The apartment is big and comfortable. The kitchen has all necessary appliances for even a long term stay. The building and shared facilities are great too, wonderful gym, big pool, business center, playground for kids. They are beautifully maintained and clean. Location is unbeatable, close to Velaa village and all sorts of coffee shops and groceries, minutes from Chitlom metro and Central shopping mall. Sommart is super responsive and accommodating, and so is the staff working in the building.
If I ever go back to Bangkok, I will no soubt go back there!